The 5K Pace Calculator converts between 5K finish time and running pace (min/km or min/mile), calculates speed in km/h, and places your time in a 7-level fitness category (World Class to Just Started) calibrated separately for male and female runners. Enter a finish time or pace and get: per-km splits with a visual bar..
YOUR 5K RESULTS
5K FINISH TIME
25:00
PACE / km
5:00
PACE / mile
8:03
SPEED
12.0
km/h
FITNESS LEVEL (MALE)
Recreational
25-30 min — regular runner
World record 12:35 (Cheptegei 2020) — you are at 50.4% of WR pace
5K FITNESS LEVELS (MALE)
PER-KM SPLITS
TRAINING PACES (from your 5K pace)
| Training Zone | Pace / km | Purpose |
|---|---|---|
Easy / Recovery | 6:45 | Conversational pace, Z1-Z2, 60-75% effort |
Moderate / Steady | 5:45 | Comfortably hard, Z3 aerobic |
Tempo / Threshold | 5:24 | Lactate threshold, Z4, 20-40 min sustainable |
Marathon Pace | 5:15 | Goal marathon effort, Z3-Z4 |
5K Race Pace | 5:00 | Your target 5K effort, ~95-100% VO2 max |
Interval (I-pace) | 4:55 | 5K intervals, VO2 max stimulus |
Repetition (R-pace) | 4:48 | Speed reps, form and economy |
RACE PREDICTIONS (Riegel formula)
| Race | Predicted Time | Pace / km |
|---|---|---|
| 🏃 5K | 25:00 | 5:00 |
| 🏃 8K | 41:09 | 5:09 |
| 🏃 10K | 52:07 | 5:13 |
| 🏃 15K | 1:20:07 | 5:20 |
| 🏃 Half Marathon | 1:55:00 | 5:27 |
| 🏅 Marathon | 3:59:47 | 5:41 |
Riegel formula: T2 = T1 × (D2 / D1)^1.06. Assumes similar aerobic fitness across distances.
Select your unit system (km or miles) and sex. Sex determines which fitness category table is displayed — the benchmark ranges differ between male and female runners. Both unit options show pace in km and mile simultaneously in the results.
Choose whether to enter a finish time (MM:SS) or a running pace (min/km or min/mile). In time mode, enter minutes and seconds separately using the two number inputs. Quick-select buttons for common 5K times are provided from 15:00 to 45:00. In pace mode, type your pace in M:SS format.
Read your results immediately: 5K finish time, pace in both min/km and min/mile, speed in km/h, and your fitness category from a 7-level scale (World Class, Elite, Advanced, Intermediate, Recreational, Beginner, Just Started) calibrated separately for male and female runners. A world record comparison shows what percentage of world record pace you are running at.
Check the per-km splits bar chart — 5 equal bars showing each kilometre's split time and the cumulative time at each marker. This helps visualise even pacing through the race and plan your effort distribution.
Review the training paces table — 7 training zones derived from your 5K pace using Jack Daniels VDOT methodology: Easy, Moderate, Tempo (lactate threshold), Marathon, Race (5K pace), Interval, and Repetition. These are the prescribed paces for each type of training run. The race predictions table uses the Riegel formula to project your expected finish times at 8K, 10K, 15K, half marathon, and marathon.
5K Pace Calculator — complete worked example: INPUT: 5K finish time 25:00 STEP 1 — Pace calculation: 5K = 5 km exactly Pace = 25:00 / 5 km = 5 min/km = 5:00/km Speed = 60 / 5.0 = 12.0 km/h = 7.46 mph Pace in miles = 5.0 × 1.60934 = 8:03/mile STEP 2 — Per-km splits (even pacing): km 1: 5:00 (split), 5:00 (cumulative) km 2: 5:00, 10:00 km 3: 5:00, 15:00 km 4: 5:00, 20:00 km 5: 5:00, 25:00 STEP 3 — Training paces (from 5:00/km race pace): Easy: 5:00 + 1:45 = 6:45/km Moderate: 5:00 + 0:45 = 5:45/km Tempo: 5:00 + 0:24 = 5:24/km Marathon pace: 5:00 + 0:15 = 5:15/km Race (5K): 5:00/km Interval: 5:00 - 0:05 = 4:55/km Repetition: 5:00 - 0:12 = 4:48/km STEP 4 — Race predictions (Riegel formula: T2 = T1 × (D2/D1)^1.06): 10K: 25:00 × (10/5)^1.06 = 25:00 × 2.085 = 52:07 HM: 25:00 × (21.0975/5)^1.06 = 25:00 × 4.60 = 1:55:00 Marathon: 25:00 × (42.195/5)^1.06 = 25:00 × 9.59 = 3:59:47 STEP 5 — Fitness category: Male, 25:00 → Intermediate (20:00-25:00 range) World record: 12:35.36 → 25:00 / 12:35.36 = 50.4% of WR pace
FORMULA REFERENCE TABLE
| Name | Formula | Description |
|---|---|---|
| 5K pace from time | Pace (min/km) = finish_time(min) / 5 | 5K is exactly 5 km. Divide total minutes by 5. 25:00 → 25/5 = 5:00/km. |
| Finish time from pace | Time (sec) = pace(min/km) × 5 × 60 | Multiply pace by 5 (km) and convert to seconds. 5:00/km → 5 × 5 × 60 = 1500 sec = 25:00. |
| Speed from pace | Speed (km/h) = 60 / pace (min/km) | 5:00/km = 60/5 = 12.0 km/h. Speed and pace are reciprocals. |
| Pace (km to mile) | min/mile = min/km × 1.60934 | 5:00/km × 1.60934 = 8:03/mile. |
| Riegel race predictor | T2 = T1 × (D2 / D1)^1.06 | Predicts finish times at other distances from 5K time. T1=5K time, D1=5, D2=target distance in km. |
| Easy pace | 5K pace + 1:45/km (approx) | Jack Daniels approach: easy runs at 60-75% effort, about 1:30-2:00/km slower than 5K race pace. |
| Tempo / threshold | 5K pace + 0:24/km (approx) | Lactate threshold pace — the fastest pace sustainable for ~20-60 min. Key training zone for 5K improvement. |
| Interval pace | 5K pace - 0:05/km (approx) | VO2 max intervals: 400-1200m repeats at or slightly faster than 5K race pace. Primary quality session. |
| Per-km split | Split time = pace × 1 × 60 sec | Each kilometre split is equal to pace × 60. At 5:00/km, every km split is 5:00 = 300 seconds. |
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Last updated: April 29, 2026 · 5K = 5000 m exactly · Race predictions: Riegel (1977) · Training paces: Jack Daniels VDOT methodology